Interesting find but I'd be really hesitant in running them.
I do 1/4 mile also and have had thoughts of what a tire failure would be like as I passed through the traps on the big end...Not something I'd ever want to experience.
Rotating mass? - They're heavy @ 15 lbs
Per their description-Made to not damage the lawn. You can bet that compound wasn't formulated with our use in mind lol.
Also got to wonder about quality control if designed for a mower going 3.5 mph.
Hoosiers, American Racers and M/T's my not be DOT rated but their intended use in sprint cars, Jrs etc is known by the manufacturer and factored into construction.
Stay safe.